KITFORMA · EDITORIAL GUIDE
Why is a negative Java remainder unsuitable for a rotating bucket index?
KitForma editorial guide. A remainder and a nonnegative wraparound index are different operations when the input can be negative.
Step-by-step guidance
A remainder and a nonnegative wraparound index are different operations when the input can be negative.
For a positive bucket count use
int bucket = Math.floorMod(offset, bucketCount); after validating bucketCount is greater than zero. This supports a negative displacement without relying on Math.abs, which has an edge case at the minimum signed value. Keep the divisor convention explicit; arbitrary negative divisors are not a useful bucket specification.
Verify offsets -1, 0, the bucket count and Integer.MIN_VALUE. Assert every index lies between zero and count minus one. This only wraps a numeric position; it does not provide a thread-safe sequence allocator or prevent two events from selecting the same bucket.Sources and verification
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